# @FUNCTION: optfeature

# @USAGE: <short description> <package atom to match> [other atoms]

# @DESCRIPTION:

# Print out a message suggesting an optional package (or packages) which

# provide the described functionality

#

# The following snippet would suggest app-misc/foo for optional foo support,

# app-misc/bar or app-misc/baz[bar] for optional bar support

# and either both app-misc/a and app-misc/b or app-misc/c for alphabet support.

# @CODE:

# 		optfeature "foo support" app-misc/foo

# 		optfeature "bar support" app-misc/bar app-misc/baz[bar]

#		optfeature "alphabet support" "app-misc/a app-misc/b" app-misc/c

#

optfeature() {

	debug-print-function ${FUNCNAME} "$@"

	local i j msg

	local desc=$1

	local flag=0

	shift

	for i; do

		for j in $i; do

			if has_version "$j"; then

				flag=1

			else

				flag=0

				break

			fi

		done

		if [[ $flag -eq 1 ]]; then

			break

		fi

	done

	if [[ $flag -eq 0 ]]; then

		for i; do

			msg=" "

			for j in $i; do

				msg="${msg} ${j} and"

			done

			msg="${msg:0: -4} for ${desc}"

			elog "${msg}"

		done

	fi

}